Technical Diagnostics and Non-Destructive Testing, 2026, №01

2026 №01 (02)

DOI of Article 10.37434/tdnk2026.01.03

2026 №01 (04)

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"Tekhnichna Diahnostyka ta Neruinivnyi Kontrol" (Technical Diagnostics and Non-Destructive Testing) #1, 2026, pp. 23-31

Damage of stainless rolled pipes of gasoline vapor cooling units in oil refineries

S.O. Osadchuk, L.I. Nyrkova, L.V. Goncharenko, V.P. Yelahin, S.Yu. Kovalenko

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: svetlanaosadchuk@meta.ua

The peculiarities of damage of stainless rolled pipes of gasoline vapor air cooling units at an oil refi nery after 1 year of operation, which were detected on the boundary of transition from the rolled part of the pipe to the unrolled part, were investigated. Corrosion cracking occurred as a result of the combined eff ect of a hydrocarbon environment at elevated temperature (more than 80 °C) and the stressed state of the product caused by rolling. Optical microscopy showed that the pipe wall thickness was uneven. The propagation of a through crack and corrosion damage to the inner surface in the form of a network of cracks located transversely to the pipe axis developed by the mechanism of intergranular fracture. Scanning electron microscopy revealed the presence of sulfur and chlorine in pitting, which indicates its release from the hydrocarbon environment. A decrease in nickel content from 2.59 to 7.47 % compared to the base metal (10.5 %) was also found, which caused electrochemical heterogeneity and a diff erence in microhardness (the potential diff erence between the rolled and unrolled areas on the inner surface of the specimen was 0.087 V, microhardness was 405 HV and 356 HV, respectively). 18 Ref., 2 Tabl., 7 Fig.
Keywords: stainless steel, gasoline vapor cooling plant, rolled pipes, internal corrosion, stress corrosion cracking

Received: 21.01.2026
Received in revised form: 10.03.2026
Accepted: 10.04.2026
Posted online: 23.04.2026

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This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Suggested Citation

S.O. Osadchuk, L.I. Nyrkova, L.V. Goncharenko, V.P. Yelahin, S.Yu. Kovalenko (2026) Damage of stainless rolled pipes of gasoline vapor cooling units in oil refineries. Technical Diagnostics and Non-Destructive Testing, 01, 23-31. https://doi.org/10.37434/tdnk2026.01.03

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